Retractable locking mechanism



FIG. 1 is a top view showing my new design;

FIG. 2 is a front exploded view of FIG. 1;

FIG. 3 is a bottom view of FIG. 1;

FIG. 4 is a side exploded view of FIG. 1;

FIG. 5 is a back exploded view of FIG. 1; and,

FIG. 6 is a perspective exploded view of FIG. 1. 

The ornamental design for a retractable locking mechanism, as shown and described. 